Which statement describes elements? A. Each element is made up of the same type of atoms.
B. Each element is made up of different types of atoms.
C. All elements exist only in the liquid phase.
D. All elements are solid metals.

B

Explanation:

the volume increases

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.